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114-7778 is an ignition switch box built for 150 HP Mercury/Mariner 1978-99 models with Serial # 4868998 thru OG960499. Used to replace aging switch boxes that can cause poor spark or rough running.
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Part #: 114-7778
Mercury150 HPSwitch BoxWeight: 2 lb
3.0 / 5  (6 votes)
114-7778 is an ignition switch box built for 150 HP Mercury/Mariner 1978-99 models with Serial # 4868998 thru OG960499. Used to replace aging switch boxes that can cause poor spark or rough running.
List Price: $274.99
Your Price: $120.10
Normally In Stock

In Stock items ship same day if ordered before 3PM CST (excluding weekends and holidays)

Replaces OEM#'s

332-5524, 332-7778, 332-7778A1, 332-7778A3, 332-7778A5, 332-7778A6, 332-7778A9, 332-7778A12

Product Details

Built for harsh marine environments, this ignition module supports consistent spark output, smoother acceleration, and dependable high-RPM ignition operation.

Heavy-duty electronic components and insulated internal circuitry are designed to withstand heat cycling, humidity, and harsh outboard operating conditions.

Features

  • Helps maintain reliable spark delivery under load
  • High-energy CDI ignition switching design
  • Marine-grade sealed electronic construction
  • Designed for stable spark sequencing

Common Symptoms of a Failing Switch Box

  • Hard starting conditions
  • Random cylinder firing issues
  • Intermittent spark or ignition drop-out
  • Loss of top-end RPM

Need Fitment Help?

Tell us your brand, horsepower, and part number. We can help verify fitment before you order.

Support PDF files appear on this page when available.